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Earnings Per Share - The denominator for the calculation of diluted earnings per share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Earnings Per Share - Denominator For Calculation Of Diluted Earnings Per Share
Numerator for basic and diluted earnings per share	$ 279,654	$ 20,259	$ 419,632	$ 100,813
Denominator for basic earnings per share - weighted average	15,306,008	15,164,440	15,291,968	15,078,933
Effects of dilutive securities:
Stock options for employees, directors and outside consultants	65,811	221,654	62,504	205,138
Denominator for diluted earnings per share	15,371,819	15,386,094	15,354,472	15,284,071
Basic Earnings Per Share	$ 0.02	$ 0	$ 0.03	$ 0.01
Diluted Earnings Per Share	$ 0.02	$ 0	$ 0.03	$ 0.01

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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Net number of share options (or share units) granted during the period.

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